steamlogin.py

#http://pastebin.com/i9u7jQ32
#http://pastebin.com/jt01hF4b

import requests
import base64
import rsa
import webbrowser


username = 'username'
password = 'password'

url = 'https://steamcommunity.com/login/getrsakey/'

headers = {"Content-type": "application/x-www-form-urlencoded",
           "User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0"}

data = {'username':username}

s = requests.session()

r = s.get('https://steamcommunity.com/')

rsaurl   = 'https://steamcommunity.com/login/getrsakey'
loginurl = 'https://steamcommunity.com/login/dologin/'

key = s.post(rsaurl, data=data, headers=headers)

mod = key.json['publickey_mod']
exp = key.json['publickey_exp']

pk = rsa.PublicKey(int(mod, 16), int(exp, 16))
encrypted_password = rsa.encrypt(password, pk)#.encode('base64')
encrypted_password = base64.encodestring(rsa.encrypt(password, pk))


data['password']     = encrypted_password
# data['password']     = password
data['rsatimestamp'] = key.json['timestamp']
data['emailsteamid'] = 'myemail@gmail.com'
#data['emailauth']    = ''

login = s.post(loginurl, data=data, headers=headers)

print login.json['message']

if login.json.get('captcha_needed'):
    print 'Captcha is needed'
    webbrowser.open("https://steamcommunity.com/public/captcha.php?gid=%s" % 
                                                  login.json['captcha_gid'])
    data['captchagid'] = login.json['captcha_gid']
    data['captcha_text'] = raw_input('Enter captcha: ')

data['redir'] = 'http://steamcommunity.com/actions/RedirectToHome'